Scarifier



Hume l2, i923.

E. F. v@comMII-IAM ET Al.

SCARIFIER Filed April 4, 1922 2 Sheecsf-Sheet l June E2, 1923.

E. F. cooKlNs-IAM ETAL SCARIFIER 2 Sheets-Sheet 2 Filed April 4, 1922 gyn/mmh@ .Patented .lune l2, l923.

leraar Eeste;

Env/'Ann r. coomnrrara ann Devin coen, or rnnnirronr, new Yoan, As-

SIGNOBS T0 ACME ROAD MACHINE A CORPORATION.

appneatiog; fixed apre 4,

To all whomz't may concern:

Be it known that we, EDWARD F. Cookin- HAM and DAVID .B. Coon, citizens of the lUnited States, residing at Frankfort, in the county of Herkimer and State of New York, have invented certain ne-w and'useful lmprovements in Scariiiers, of which the following is a specification.

This invention relates to scariliers particularly of that type used for breaking up old roads or the rlike preparatory to rebuilding or resurfacing the same, and is especially adapted for use as an attachment to a road roller or other tractor', the scarifier being attached to the rear of the road roller, and embodying a tooth bar which may be raised or lowered by a fluid pressure actuated means connected to the tooth bar. u

The object of theinvention is togenerall,7 improve the construction of such attachments, and particularly to increase the strength and rigidity of the parts and to improve the manner of connecting the 'same to the road roller.

A further object of the invention is to improve the means for holding the teeth in place.

provide a pair of power cylinders, instead of one as heretofore used, which results in decreasing the diameter of the cylinders and enables the tooth bar to be hung` closer to the roller, and gives a more vertical thrust thereona requiring less fluid pressure in the cylinders.

A further object of the invention is to provide a construction by means of which a broken tooth bar can be removed and replaced without disturbing the other parts.

Other advantages and improvements in the details of the structure will be apparent from the following description.

The invention is illustrated in the accompanying drawings in which Fig. 1 is a rear elevation of the attachment. Fig. 2 is a side elevation including also a part of the road roller. Figs. 3, 4 and 5 are side, end and top views of the blocks or arms which hold the teeth. Fig. 6 is a section on the line 6 6 ot Fig. l.

Referring specifically to the drawings, 30 indicates the rear end of a road roller or other traction vehicle to which the attachment is applied, the main Support being provided by means of a pair of draw plates 31 A further object of the invention is to RY COIVIIANY, 0F lFItAlTIliORT, NEW YORK,

schmieren.

1922. Serial No. 549,540.'

which are flanged at the top and bolted to the under side of the body of the road' roller, these plates standing vertically and being spaced apart to the extent permitted the width ofthe roller. .The'lower rear corners of the .draw platesare provided with holes to receive a cross draw shaftjl, the draw plates being reinforced by plates 2 around the holes through whichthe shaft extends. The ends of the shaft 1 project at each side beyond the draw plates. tofreceive clevises 3 which are free to turnon the shaft andi form a pivotl connection by means of which the tooth bar canbe rocked up or down. The

" clevises 3 have aws 3a between which are re-V ceived the stern flange of a T-section'draw 1l, which issecurelybolted to the clevises. The tooth holding blocks or arms 5 are bolted directly to the head flanges of the draw bar e, and these blocks are 'spacedalong the-barl according to the number of teeth.y lEach block 5 consists of a flanged casting with a rear face 5a through which the attaching bolts1D entend, andthe front face vhaving an upper seat 5c and a lower 'seat 5d, with a V-- shaped groove 5e extending vertically in' the seats, to receive the teeth. `8. These teeth are hard steelbars, preferably square in cross section, and may be point-edl at 'both' ends, and

they Vare held to the blocks 5 by means of` clips or caps l1 secured `tothe seats by bolts 12. The top faces of the tooth blocks 5. are

provided with shouldered seats on which-is bolted a heavy angle cross'piece 6 whichserves to stiften the blocks and space the same apart, and in the angle of this cross piece are fitted and bolted a. pair of thrust blocks 7 which in turn are pivoted as indicated at 17 to the lower ends of piston rods 8 the pistons of which operate in a pair of cylinders 15 the upper ends of which are pivoted as at 16 between the flanges 18 of a pair of upright brackets or standards 19 i secured to a cross bar 20 at the rear end of the roller frame. These two cylinders 15 are spaced apart, and fluid pressure is admitted or exhausted from opposite ends of the cylinders by means of pipes 33 connected to a pressure tank or other suitable source of supply and controlled by suitable valves., the tank and valves being not shown.

In connection with the tooth bar, and to govern the depth to which the teeth will dig into the ground, a pair of gage wheels i 40 arebem-ployedVo-ne of which islooated yor lowered with the bar.

at eaeh end of the bar, each wheel r4:0 Yis mounted on a stub axle 9 projectingfrom an angleblock 9@ set in theangle of the cross fbar 6 and ksecurely Vbolted thereto. vThese gage wheels travel along y' the ground beside theteeth, and by adjusting the teeth the depth of cut may be varied. Any 'suitable means maybe provided for raisingv and lowering the tooth bar, and when raised or lowered it will rook on lthe shaft 1, to set thete'eth into or out ofthe work, the vgage raised wheels being carried ,by and v.being A The clevises Sipermit kfree rpivotal motion v I -on the v'draw shaft 1 while transmitting a dithe drawT barili andthe cross tand rigidly if onetooth block-becomes broken it disturbing v the ysupporting bars 4 and. v6. s .The connection -zafforded by -the blocks 17 toI the .piston rods permits the' pressure v to' be applied directly f to the tooth'bar, and the 'cross bar (Sprovides improvedmeans for this connection f aswell ias ffor -supportingthe stud shafts 9, Vwithout the necessity for ,ashaft entirely across vthe attachment. The angle ibar is also more rigid ythan al shaft would "be, andthe gage Wheels aremore stiflly carextending Tied", withoutany danger of bending an aXle 'v-extending 'v entirely across between wheels. fIt will be'noticed'that practically. all of the `parts can' be cast, and machine work is large- Vly-unnecessary. By using a pair of power lcylinders '15,spaced apart, the pressure 1s more evenly applied to the tooth bar,and

cylinders,y of srnaller-y diameter canv be'used, einstead of a single'cylinder of large dia1neter, whereby'thefpressure --aXis is brought the pressure can nearery toy the `body of ythe .road.`.engine, and be exerted more nearly in a vertical line.. It will bey understood that when the drawv bar is raised or lowered vthe cylinders swing von their trunnions 16` v-to accommodate the lateral movement.

By using the dependin'gfdraw plates31 the line Aof draft is brought down close to the ground'y and consequently close to the work which is advantageous in transmitting the draft to the teeth and in holding y the same in theground-` lVe claim: v f y j 1. A scarifyingv attachment comprising a draw bar, a plurality of individual tooth blocks spaced alongthe bar, each block com-` prising a flanged casting with a front yface secured to the bar, anda rear face having upper and lower seats, a tooth clamped against the seats, and a cross bar secured toy thetops of theblocksp ,2. .A scarifying attachment,omprisingl av draw bar', individual'toothblocks secured thereto at their front ends, teeth 'clamped toy the rear ends"` ofthe tooth blocks," a cross the same.k p l y y, v g 3. A scarifying attachment comprising'a bar secured to and extending acrossthe top y l facesfof the tooth blocks, and powermeans connected tosaid crossjbarto 4raiser and lower draw bar having rear'li'anges, flanged tooth blocks bolted to said flanges, .teeth clamped tothe rear ends of'said blocks, a `flanged cross bar secured to the top faces vof the tooth blocks,l power means g connected'to they cross bar lto yraise and 'lowerthe same, stub shafts fastened to the ends-of the cross "bar,

and gagewheels mounted on the stubl shafts.

In testimony whereof,`we aliiir our signatures in presenceof two witnesses. l j Y DAVID B." COOK; v EDWARD ECOOK'INHAM. Witnesses: e y v f ELMERHOSFORD,

BENJ. TL BABBi'rii. 

